cislunar

adjective

cis·​lu·​nar (ˌ)sis-ˈlü-nər 

: lying between the earth and the moon or the moon's orbit

cislunar space

Examples of cislunar in a Sentence

Recent Examples on the Web

If the United States does not invest in these technologies, Sonntag writes, its competitors will then be able to field them first and potentially control cislunar space. — Leonard David, Space.com, 28 May 2026

The company is also involved in the Air Force Research Lab’s Oracle-P program to build space situational awareness spacecraft in cislunar space. — Eric Berger, ArsTechnica, 7 May 2026

That's a transformation of cislunar economics, enabled precisely by pairing cheap launch with efficient in-space propulsion. — Fred Kennedy, Forbes.com, 17 Apr. 2026

Word History

First Known Use

circa 1877, in the meaning defined above

Rhymes for cislunar

• lacunar
• lunar
• schooner
• sooner
• spooner
• tuner
• semilunar

Kids Definition

cislunar

adjective

cis·​lu·​nar (ˈ)sis-ˈlü-nər 

: lying between the earth and the moon or the moon's orbit